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2.3 Trip Computer    >   23 Electrical Test Program - Test Model

Test scope Test connection Test condition Nominal value Possible cause/Remedy 1.0 Trip computer control module (N41) Voltage supply Circuit 30 6 N41 7 Ignition: OFF Remove Trip computer control module (N41) and disconnect 8-pole connector 11 - 14 V Wiring, Fuse 13 in fuse and relay box (F1) Values O.K.: 1.1 1.1 Voltage supply Circuit 15R, fused 6 N41 8 Disconnect 8-pole connector from N41 Starter switch (S2) in position "1" or "2" 11 - 14 V Wiring, Fuse 10 in fuse and relay box (F1), Values O.K.: 1.2 2.0 CAN bus data lines resistance 3 N41 4 Ignition: OFF Disconnect 8-pole connector from N41 (Instrument cluter (A1) andengine control module (N3/10) are connected to CAN) around 60 (Control modules N3/10 and A1 contain 120 resistance respectively for CAN data bus termination. Parallel connection results in 60 . CAN: , N3/10 A1 Values around 120 : A1 AD54.30-P-6000-5GH in WIS N3/10 (check CAN input resistance ) Values O.K.: 2.1 2.1 CAN bus data lines Low-Voltage data line N41 4 Ignition: ON 8-pole connector diconnected from N41 around 2.3 V A1 N3/10 Values O.K.: 2.2 2.2 CAN bus data lines High-voltage data line N41 3 Ignition: ON 8-pole connector diconnected from N41 around 2.6 V A1 N3/10